AUSTIN has to be Post Malone’s guitar album, if only because, as he proudly noted, he plays guitar on every track. He’s no stranger to the instrument of course, and he has dialed down the trap-pop dial and replaced it with various speeds of six-string pop-rock. He’s still drinking too much, still smoking like an oil fire. But the most interesting thing about Post Malone’s fifth album is how his vices have changed from rote signifiers to features of his mental landscape. His chauffeur’s doing tequila shots, so Post takes a cab home. He pukes in someone’s bathroom, then pauses to admire the tiling. His relationships are co-dependent, but at least he’s got company. Propulsive lead single “Chemical” tints its bad romance with a yearning three-note bass figure. “Outside of the party, smokin’ in the car with you/‘Seven Nation Army,’ fightin’ at the bar with you,” he sings, cherishing every tainted memory. “Sign Me Up” is the same situation with a New Romantic spin. “If your love is a cult/Then I’m in it,” Post shrugs, skipping past all the red flags until he comes upon his one true dealbreaker: when she tries to take his liquor away.